Farm tractor



Aug. 25, 1936. RAY 2,051,896

FARM TRACTOR Filed July 15, 1932 I 3 Sheets-Sheet l awe/whom (flax/w ZBay C. T. RAY

FARM TRACTOR Aug. 25, 1936.

Filed July 15, 1952 5 Sheets-Sheet 2 c. r. RAY

FARM TRACTOR Aug. 25, 1936.

Filed July 15, 1932 3 Sheets-Sheet 5 C/zw/wfiay w W a t/W113 PatentedAug. 25, 1936 UNITED STATES] PATENT" OFFICE Avery 8; Sons Company,

poration of Delaware Louisville, Ky., a cor- Application July 15, 1932,Serial No. 622,759 14 Claims. (CI. 97-50) This invention relates to afarm tractor having as a part thereof a clutch, a bail and certain ad-'junctive elements which form a power lift mechanism adapting thetractor for the convenient connection therewith of tillage implements(such as plows, planters, cultivators, stalk cutters, etc.) arrangedunderneath or at opposite sides of the body of the tractor, as well asfor farm implements, wagons, etc., generally, which, when operativelyconnected to the tractor, occupy a trailing relationship with respect tothe latter.

The implements to be operatively connected to the power lift mechanismform no part of the present invention and accordingly have not beenillustrated herein. Said implements may be of diiierent kinds fortillage or other ground or crop treating purposes, examples of which areillustrated in my Letters Patent of the United States, No. 1,885,763,issued November 1, 1932, upon my application filed Dec. 29, 1930, andnumbered, serially, 505,416 and in certain applications filed in theU.'S. Patent Oflice July 15, 1932, and numbered, respectively, 622,757,622,758 and 622,760. The said patent and applications illustrate anddescribe the tractor forming the subject of the instant invention butclaim the same only in its combinative relationship with the tillageimplements themselves, the instant application claiming the tractor andthe means which form a part of the tractor and adapt it for theinterchangeable connection thereto of said implements.

In the accompanying drawings, wherein like characters of referencedenote corresponding parts in the several views:

Fig. 1 is a side elevation of a tractor provided with a clutch and withmeans which cooperate with the clutch in adapting the tractor fordetachable connection therewith of various tillage implements and forraising and lowering said implements from and into ground-workingposition;

Fig. 1 is a detail view of a part of one side of the tractor showing themeans at said side by which the corresponding end of a raising andlowering ball is connected to the clutch at the opposite side of theimplement and to which the other side of said bail is connected;

Fig. 2 is a plan view of the tractor;

Fig. 3 is a perspective view of a part of the tractor, showing theclutch and bail and also showing one of the members formed on thetractor to receive a thrust member which forms part of a tillageimplement and through which forward motion is transmitted to saidtillage implement;

Fig. 4 is a detail representation showing the clutch in side elevationand the connection of the bail thereto, and shows diilerent positions ofthe clutch and bail in full and dotted lines, respectively;

Fig. 5 is a sectional representation on the line 5-5 of Fig. 4, andshows one means by which the 5 ball arm at the side 01' the tractoropposite the clutch may be operatively connected to the driven member01' said clutch;

Fig. 6 is a detail sectional view on the line 6-6 of Fig. 5;

Fig. 7 is a detail representation particularly intended to show therelative position of the locking element l9) and the driven member ofthe clutch near the end of the lowering movement of the clutch and alsoshowing one of the arms (28") of the lever in the position it occupiesrelatively to the-corresponding opening l8 during such movement Fig. 8is a detail representation of one of the sockets with the rear end of athrust member oi- 20 an implement mounted therein, said member beingbroken oil.

The tractor ,here shown, designated generally by the letter A, is of thetype adapted for row crop operations and except as to the parts whichhave been added thereto to adapt it for the purposes hereinbeforesuggested may be of any suitable construction and hence calls for noparticular description further than to state that the carrying wheelsl0, l0 at its rear end are sufllciently wide apart to permit tillageimplements arranged for two-row row crop operations to be arrangedbeneaththe body of the tractor and the carrying wheels II, II at itsforwardend are arranged adjacent to each other and close to the logitudinal center of the tractor and preferably are toed in one towardthe other to permit said wheels to run between the rows being tilled. Ij,

The tractor is provided at one side withla clutch, B, whose drivingmemberv is marked J2. and whose driven member is marked, I35; Inpractice, said driving member is continuously rotated from anyappropriate moving part o'f the tractor and the drivenmember'isl'intermit tently rotated from the driving member, means, undercontrol of the operator of the tractor, being provided to connect thedriven member to the driving member when the implements connected to thetractor are to be raised from their. working position to transportposition or are to be lowered from transportposition to workingposition. The clutch is so constructed that one partial revolution ofits driven member either raises or lowers the implements havingconnection with said driven member, according to the position of body ofthe tractor.

The tractor is also provided with two arms,

I4 arranged at opposite sides thereof and whose forward ends havepivotal connection with the" These arms are swung in clockwise andcounterclockwise directions in the successive partial revolutions of thedrive'n'member of the clutch, to which driven member they may beconnected by any suitable means, the

preferred means being shown and presently described. They are suitablyconnected with each other so as to operate simultaneously, as by amember I4". It be observed that in the illustrated-embodiment the armsI4, Il'and 'Il" conjointly form a lifting bail whose member I4"is'journalled in brackets X suitably secured to any suitable part of thetractor frame. In the illustrated, preferred, embodiment of theinvention, each arm is provided at an appropriate place or places in itslength with a plurality of lugs or ears I, I4 which are fixedly securedthereto in any suitable way. The cars I4 form elements of connectingmeans between the driven member I3 of the clutch and the respectivearms;

and through which connectingmeans said armsare swung in clockwise and.counterclockwise directions, about the member: Il as the axis ofsuchmovement, by the respective partial revolutions of said drivenmember; -The illustrated connection between the clutch-member I3 and thearm I4 is a direct one consisting of the lug or ear I4 projecting fromsaid arm and a link I5 whose opposite ends are pivoted to said lug orearand to said driven member, respectively. The pivotal connection of saidlink tothe clutchmember I3 is shown at I5 and. it will be evident" thatwhen said clutch-member moves in a clock-- wise direction, throughoutone-half of a complete.

revolution, from the position shown in full lines in Fig. 4-, the arms,ll of the ball will be swung to the position indicated in dot-and-dashoutline. in ,said figure.- Itwi1l also be evident that. in the nextone-half revolution of the driven member of the clutch, the bail armswill bemoved in counterclockwise, direction from the positionshown indot-and-dash outline in Fig. 4 to the position shown in full lines insaid figure. It may:

- be here mentioned that the implements which are.

to be raised and lowered as the result of the de: scribed movements ofthe clutch and bail have connection with the arms of the bail, theconnections being either to the lugs or ears ll or to the outer ends ofthe bail arms. In my aforesaid co-pending application Ser. No. 622,757 Ihave illustrated and described aconstruction in which the connections tothe implements include links whose rear ends are respectively pivoted tothe lugs or ears I4 as indicated at I00 in dotted outline in the instantapplication; and in my aforesaid Patent No. 1,885,763 I have illustrateda construction in which tillage implements are connected by chains tothe rear ends of the bail arms, as indicated in dotted outline at IIIIin the instant application. In order that said ball may most effectivelyperform its function in the rais ing and lowering of said implements,without at the same time necessitating the provision of a separateclutch mechanism for the respective arms of the bail, the arm I4 alsohas connection with said driven clutch-member I3. Any suitable means bywhich the driven clutch-member is connected to the bail arm I4 may beresorted to, one means suitable for the purpose being illustrated inFigs. 5 and 1". This means comprises a shaft I6, one of whose ends iskeyed to the driven member l3, as shown at I6, and the other of whoseends is provided with a crank arm I6 whose upper end is fixedly securedto the shaft and whose lower end is connected by a link I6" (Fig-.1) tothe lug or ear ll projecting from the bail arm II. The shaft I6 extendstransversely of the tractor and protrudes from the latter at both ends;one of its said protruding ends being keyed as stated to the drivenclutch- --member I3 and the other being provided with the crank arm IS.

The driving member I2 of the clutch is provided with a circumferentialrim I2 whose inner surface is formed with a series of teeth I2 to beengaged by a pawl I! when it is desired to rotate the driven member I3of the clutch to thereby raise or lower the implements connected to thetractor. Thispawl is moved into its engaging relationship with the teethI2 by means under control of theoperator of the tractor and is movedautomatically out of its engaging relationsliip'with said teeth at theend of each one-half of a complete revolution of the clutch, at whichtime the raising or lowering of the implements will have been completed.Means co-acting with relation to said pawl and the driven member of.

the clutch to effect the release of said driven member from the-drivingmember when the implements have been raised or lowered, as the case maybe, and to hold the driven member against movement in the interimsbetween the raising and the lowering operations will now be described.

The driven member I3 is provided with peripheral recesses I8, I 8arranged at opposite-sides o'f its axis in positions which define thesuccessive partial revolutions of said member. A'holding element I9 isarranged to be seated in either "of said recesses and is carried by ameans which is operative to withdraw it from the recess in which it isseated when operation of the driven member is to be initiated. Saidmeans is preferably pedal-operated and as here shown comprises an arm-20 which projects from one end of a'lever 2| whose opposite end isprovided with a foot-piece 22 conveniently located to be engaged by thefoot of the operator of the tractor. The lever 2I' and arm 20 togetherform a bell crank and said bell crank is provided at the junction ofsaid lever and arm with a pivot pin 23 which is fixed thereto and isjournalled in a bracket 24 projecting from any suitable part of thetractor frame. A spring 25 is provided to-maintain the holding elementI9 in engagement with the driven member of the clutch and to hold thelever 2| yieldingly'with its foot-piece in raised position. As hereshown, this spring 25 is connected at one end to the bell crank throughthe medium of an angular member 26 which is fixed to and projects fromthe pivot pin 23. The opposite end of said spring is connected to aprojection 21 which extends from and is suitably secured to the bracket24.

The pawl I1 is carried by a lever 28 which is curved to extend aroundthe axis of .the driven clutch-member I3 and is pivoted to said memberat 29. The connection between the pawl I1 and the lever 28 is providedby a stub shaft or pivot 30 Whichis carried by the lever 28 and extends9,051,896 through a slot 80" in the clutch-member I8. The

opposite endsof the lever 28 project to form arms 28. These arms arearranged adjacent the respective recesses I8 and' I8 in the rim of thedriven clutch-member IS. A spring 8| is connected to the lever 28 andtends to turn said lever about its fulcrum at 28. ina direction in whichthe ends of the anns 28* will lie over the respective recesses I 8, l8and the pawl II will be moved into an engaging relationship with theteeth l2 of the driving clutch-member. This tendency is normallyresisted by the holding element l8 which engages the particular arm orprojection 28 adjacent the recess |8 or l8 in which said holding elementis seated. Said holding element I8 is preferably of rotative nature forfriction-reducing purposes. The spring ,3l has one of its. ends attachedto a bracket 32 which moves with the driven clutch-member i3 and itsother end attached to the lever 28 which also moves with said drivenmember.

When the parts of theclutch mechanism are in the position shown in fulllines in Fig. 4, movement therefrom in the direction of the arrow willbe a raising movement with respect to the implements having connectionwith the clutch. It will be evident that when the outer end of thelever2 lis pressed downward the arm will be swung correspondingly and willwithdraw the roller is from the recess l8'in which it is shown as beingseated. This movementof the roller disengages it from the arm orprojection 28* at this side of the lever 28, whereupon thespring 3|becomes operative to swing the lever 28 about its fulcrum at 28sufliciently to move the pawl ll into an engaging relationship with theteeth I2 and also to move both of said arms or projections 28* of saidlever 28 into position in which they overlie the respective recesses l8,l8 (see Fig. 7). This movement is a slight one and will have beenaccomplished by the time the roller l8 has been fully withdrawn from therecess l8. The driven member l8 of the clutch, having been thus clutchedto the driving member l2 and freed from the roller i8, is now movedrotatively, (together with the lever 28) by'said driving clutchmember.When said member i8 and lever 28 have been thus moved the distancepredetermined for the raising operation (that is, one-half of a completerevolution in, the illustrated embodiment) the recess i8 and thecorresponding arm projection 28 will be in the position in which therecess l8 and corresponding arm or projection 28' are shown in Fig. 4.In this movement of the driven clutch-member l3 its outer edge willtravel in engagement with the roller is, said roller being heldthereagainst by the spring (see Fig. 7)

It will be noticed that the rim of the driven clutch-member i3 hascam-shaped projections a and b at opposite sides of each of its recessesl8, I8" and that the cam-shaped projections a are at the sides of therespective projections which are in the direction of motion of saiddriven clutchmember and extend a lesser distance from said member thando the cam-shaped projections 12 at the opposite sides of the respectiverecesses. The arms or projections 28 of the lever 28 are of such lengththat when they have been moved into the positions in which they overliethe respective re-'- cesses l8, l8 they will protrude beyond the outersurfaces of the cam-shaped projections a, respec-' tively. They are inthis position during the rotative movements of the clutch-member l8.Accordingly, it will be seen that at about the end of the rotarymovement predetermined for the said 85 of the clutch-driving memberclutch-member l8 the roller 18 will engage the protruding end of thearmor projection 28' at the corresponding side of the drivenclutch-member and will act thereon to move them or lever 28 about itsfulcrum at 28 and against the tension, f h ing 3|. and hence cause thepawl II to be released from the teeth l2, immediately prior to theentrance of said roller to its seat in the recess l8. Said roller inentering either recess 18 or I 8' travels along the correspondingcam-shaped projection a and when fully seated in said recess is heldagainst any tendency to accidental withdrawal therefrom under the weightof the imple-: ments by the cam-shaped projections 11 and the tensioningspring 25.

It will be obvious that when the implements are to be lowered, theoperator again presses upon the foot-piece 22 whereupon the drivenclutch member is locked to the driving member throughout the remainingone-half of a complete revolution, which in this instance is in adirection to accomplish such lowering, and is automatically releasedtherefrom at the end of said movement; all as previously explained.

It has hereinbefore been stated that the clutch derives movement fromany appropriate part of the tractor. It is deemed to be unnecessary herein to illustrate or describe any particular con" nection between thedriving member l2 of said clutch and the part ofthe tractor from.whichsaid member is continuously ation of the tractor: but I haveillustrateda gear 88 as a part of such connection. Said gear is shown asbeing connected by a key 84 to the hub I 2, through which hub the shaftl8 extends and within which said shaft is rotatably mounted. The end ofthe shaft which extends through the gear l8 and rotated in the oper-'-through the hub 85 is preferably reduced in diameter with respect to theremainder of the shaft and thereby forms a shoulder 86 against which oneside of the gear 83 bears. A collar 8! bears against the other side ofsaid gear and said shoulder and collar cooperate in holding the gearagainst lateral movement. f

88 designate sockets which are integral with the tractor, or otherwiserigidly secured thereto: Each of these sockets has an open forward endwhose walls 88' are inclined inwardly toward the center of the socket,the latter being closed at the rear end by a wall spaced inwardly fromthe walls 88' to provide a passageway 88 rearward of said walls 88'. Inthe use of .the tractor in propelling implements which are arranged in anon-trailing relationship with the tractor-thatis, to implements whichextend under, the tractor or are arranged on opposite sides of thetractor-the sockets 88 provide means by which appropriate elements (asthrust bars Y, for example) of such implements may be connected to thetractor, said elements in practice extending through the mouths of thesockets and into said passageways and receiving the forward thrust whichis imposed thereon in the forward travel of the tractor. In short,forward'movement' is' given the implements in the forward travel of thetractor through the medium of the'referred to sockets. Each-socket isprovided with a'pin 88 which extends through its passageway 88" andthrough an opening in the member of the imple.-.

ment arranged in said passageway and serves to hold saidimplement-member in its position with in the socket. These pins alsocommunicaterearward motion from the tractor to the implements,

as in backing the tractor, and.they are readily insertible or removablefor an obvious reason.

In order that they may not be lost when not in chains 4|, for example,by which they are attached to an appropriate part of the tractor body.

Reverting to the sockets, it will be noticed that their forward ends aresubstantially bell-shaped to facilitate easy entrance of the members ofthe implements which are to be seated in the passageways 38" when theimplements are connected to the tractor: and it may be here mentionedthat said passageways and implement-members are of such relative sizesthat a clearance space will be provided between saidmembers and thewalls of the passageways, which contributes to the easy insertion of themembers into the passageways and also permits relative sidewisegmovcmentbetween the tractor and the implements, provided, of course, theopenings in said implement members through which the pins 39 extend aresuch as not to interfere with said relative sidewise movement.

The front end of the tractor is provided with a bracket which comprisesa base member 42 and a pair of forwardly extending spaced arms 43connected with the base member by a member 44, which rises from the basemember and supports the arms in an elevated position. The arms 43 arearranged to receive between them an appropriate element (as asubstantially vertically disposed hanger, indicated in dotted outline atI02) which extends from a tillage implement to be propelled by thetractor and is particularly intended for use when the implement referredto includes a frame, having a longitudinal opening to receive thetractor. The bracket and the element I02 referred to co-act inconnecting the forward ends of the tractor and implement frame to eachother. It will be noticed that the arms of the bracket are arranged toprovide a forwardly open space between them and that their inner sidesare so shaped that the forward end of said space will be flared, wherebythey co-act with the bellshaped mouths ""of the sockets -38 in guidingthe rear ends of the thrust members of the implement into said sockets.In my aforesaid application Ser. No. 622,757 the bracket which forms apart of the instant application for patent is shown in its co-operativerelationship with an appropriate means by which the front end of theimplement is connected to the tractor through the medium of asubstantially vertically arranged hanger which supports a pivot aboutwhich the side sections of an implement frame have movement on ahorizontal axis and a bridging member having screws which are adjustableto hold the side sections of the frame against relative movement aboutthe said pivot or to permit such relative movement at will. In theinstant application these parts are shown in dotted outline inorder-that a purpose for which the bracket is adapted may be betterunderstood: the hanger being indicated at I02, the bridging member atI", the screws at I03, the pivot at Ill! and front members of the sidesections of the implement frame at I05, in the instant application.

The tractor is also provided with a pair of arms 4| whose forward endsare suitably connected to the rear ends of the tractor as shown at I.These arms provide a yoke which may perform either of two functions:namely, (1) it may be employed as a supporting means for connections bywhich implements whose forward ends are suitably connected to thetractor may be held against side swaying or relative movements whilepermitted to have relative up and down movements in following thecontour of the land, as in my aforesaid application numbered 505,416 andalso in my aforesaid application numbered serially 622,760; and (2-) itprovides a draft yoke to which tillage implements, wagons or other meansof vehicular nature may be connected to the tractor to be drawn by thelatter.

Having now described the invention what I believe to be new and desireto secure by Letters Patent, is:

1. A farm tractor having a clutch comprising a driving member, 'a drivenmember and means for connecting said members to each other under controlof the operator of the tractor and for disconnecting them from eachother automatically upon the completion of a predetermined partialrevolution of the driven memberz'said tractor also having a pluraltiy oflifting arms connected with each other for unitary movement andrespective ly adapted to be connected to implements which are to beraised and lowered under control of the clutch, said arms having theirupper ends journalled to the frame of the tractor, a plurality of lugsor ears respectively fixed to said arms intermediate the ends .of thelatter; and a plurality of separate links respectively connecting saidlugs or ears with the driven member of the clutch and operable bysuccessive partial revolutions of the latter to swing the arms inclockwise and counterclockwise directions.

2. A farm tractor having a clutch comprising a driving member, a drivenmember and means for connecting said members to each other under controlof the operator of the tractor and for disconnecting them from eachother automatically upon the completion of a predetermined partialrevolution of the driven member: said tractor also having a link, one ofwhose ends is pivoted to the driven clutch member and a swingablelifting arm having two lugs or ears both arranged intermediate its endsand to one of which the end of the link opposite the clutch is directlypivoted, to thereby act positively upon the arm at all times in theoperation of the clutch, the other of said lugs or ears being adaptedfor the direct connection. thereto of an element of a lifting meansforming part of a tillage implement to be connected to and operated by,the tractor.

3. Afarm tractor having a clutch comprising a driving member, a drivenmember and means for connecting said members to each other under controlof the operator of the tractor and for disconnecting them from eachother automatically upon the completion of a predetermined partialrevolution of the driven member: said tractor also having a pair oflinks arranged at its opposite sides and whose corresponding ends areconnected to said driven clutch member and a pair of unitarily movablelifting arms to which the other ends of the respective links aredirectly pivoted at places intermediate the lengths of the arms, tothereby act positively upon the arm at all times in the operation of theclutch, said arms also having means, intermediate their ends, for thedirect connection thereto of elements of lifting means forming parts oftillage implements to be connected to and operated by, the tractor, andalso having their ends opposite the links adapted for the directconnection thereto of lifting means of other tillage implements whichare applicable to the tractor interchangeably with the first mentionedtillage implements.

4.- A-farm tractor having .a= -pair of unitarily swingable arms,respectively arranged .at its opposite sides and provided with meansfor-connecting them to tillage implements, toraise and lower saidimplements from swinging movements of the arms, said tractor means forswinging said arms including a clutch comprising a driving member, adriven member, means for connecting said members to each other undercontrol of the operator of the tractor and for disconnecting them fromeach other automatically upon the comple tion of a predetermined partialrevolution of the driven member, a link forming a direct connectionbetween the driven member of the clutch and one of said arms, and asecond link having an indirect connection with said driven member, saidindirect connection including a shaft which rotates with the drivenclutch member and has an arm at its ends opposite said member, to whichthe corresponding end of the second link is pivoted.

5. A farm tractor having a clutch comprising a driving member, a drivenmember and means for connecting said members to each other under controlof the operator of the tractor and for disconnecting them from eachother automatically upon the completion of a predetermined partialrevolution of the driven member: said tractor also having a pair ofunitarily movable lifting arms respectively adapted to be connected toimplements which are to be raised and lowered under control of theclutch, said arms having their upper ends journalled to the frame of thetractor; and means operable by successive partial revolutions of thedriven member of the clutch to swing said arms in clockwise andcounterclockwise directions, said means including a link which forms .adirect connection between one of the lifting arms and the driven clutchmember, a shaft operatively connected to said clutch member and providedwith a crank and a link connecting said crank with the other liftingarm.

6. A farm tractor having a clutch comprising a continuously rotatingdriving and an intermittently rotating driven member, a lifting bailjournalled to the underside of the body of the tractor and whose armsare adapted to be connected to tillage implements, respectively, a linkforming a direct connection between one of said arms and the drivenmember of the clutch and a separate connection between the other of saidarms and said driven clutch-member, the latter connection including ashaft which extends transversely of the tractor, a crank mounted on oneend of said shaft and a link which forms a direct connection between thecorresponding bail arm and crank; said clutch having means forconnecting its driven member to the driving member under control of theoperator of the tractor and for disconnecting said driven member fromthe driving member automatically when the driven member has made apredetermined partial revolution with the driving member, and theconnections between the arms of the lifting bail and the driven memberof the clutch being operative to swing said arms in clockwise andcounterclockwise directions from successive partial revolutions of thedriven clutch-member.

7. A farm tractor having at its forward end a bracket which is fixedlysecured thereto and is provided with arms relatively arranged to providea forwardly open substantially horizontal passageway adapted to receivea member which rises from the forward end of a tillage implement and toMet with said member in connecting the tractor to said implement.

which rises from said base and a member which extends forwardly from theupper end of the latter member and is bifurcated to provide a forwardlyopen assageway adapted to receive a member of a connecting means whichrises from the forward end of a tillage implement.

9. A; farm tractor having members which re-' spectively projectoutwardly from opposite ends of its rear end portion and are adapted toimpart movement to a tillage implement having tillage elements arrangedon opposite sides of the tractor and whose frame extends across theforward end of the tractor, said tractor also having at its said frontend a bracket provided with forwardly extending arms relativelypositioned to receive between them a member which rises from the middlepart of the forward end of the portion of the implement frame whichextends across the front end of the tractor.

10. A farm tractor having at its forward end a fixed bracket comprisinga base, a member which rises from said base and arms which projectforwardly from the upper end of said member and are relatively arrangedto form a forwardly open passageway having a flaring mouth to receive anelement of a tillage implement by which the bracket is connected to saidimplement when the tractor and implement are in operative relationshipwith each other.

11. A farm tractor having means for con-.

necting a tillage implement, thereto, including means at the oppositesides of the tractor to engage thrust members of the implement and afixed bracket at the forward end of the tractor, said bracket having itsupper end provided with forwardly extending arms relatively arranged toform a forwardly open recess to receive an element projecting from theforward end of said implement.

12. A farm tractor according to claim 11, in which the means to engagethrust members of the implement are sockets formed with substantiallybell-shaped mouths and having passageways rearward of their said mouthsand in which the recess between the arms of the bracket has a flaringmouth.

13. A farm tractor having a clutch comprising a continuously rotatingdriving member and an. intermittently rotating driven member, mounted ona common axis, a pair of unitarily movable arms respectively arranged onopposite sides of the tractor and whose upper ends are journalled to thebody of the tractor, said arms being adapted to be connected to tillageimplements, and means, including a link which forms a direct connectionbetween one of said arms and the driven member of the clutch, and asecond link which forms an element of an indirect connection between theother of said arms and the driven member of the clutch, for swinging thearms in clockwise and counterclockwise directions respectively byintermittent partial revolutions of said driven member.

14. A farm tractor provided with means arranged at its opposite sidesand forward of its rear end for independent pivotal connection to thetractor of a plurality of separate tillage implements, said tractor alsohaving a second means'arranged to support appropriate connections bywhich said implements are confined against undue sidewise swaying orrelative latly in a convergent direction and thence reareral movementwhile permitted to have relative wardly parallel with each other forengagement up and down movements in following the conwith the aforesaidconnections or optionally to tour oi the land, said second meanscomprising form a draft yoke to be engaged by an imple- 5 a pair of armswhose forward end: are attached ment or vehicular structure behind thetractor. 5

to the tractor body and extend thence rearward- CHARLES T. RAY.

